248 lines
13 KiB
JSON
248 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-48830",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-07-16T11:38:08.904Z",
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"datePublished": "2024-07-16T11:44:13.987Z",
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"dateUpdated": "2026-08-05T08:52:35.367Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:52:35.367Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: fix potential CAN frame reception race in isotp_rcv()\n\nWhen receiving a CAN frame the current code logic does not consider\nconcurrently receiving processes which do not show up in real world\nusage.\n\nZiyang Xuan writes:\n\nThe following syz problem is one of the scenarios. so->rx.len is\nchanged by isotp_rcv_ff() during isotp_rcv_cf(), so->rx.len equals\n0 before alloc_skb() and equals 4096 after alloc_skb(). That will\ntrigger skb_over_panic() in skb_put().\n\n=======================================================\nCPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc8-syzkaller #0\nRIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113\nCall Trace:\n <TASK>\n skb_over_panic net/core/skbuff.c:118 [inline]\n skb_put.cold+0x24/0x24 net/core/skbuff.c:1990\n isotp_rcv_cf net/can/isotp.c:570 [inline]\n isotp_rcv+0xa38/0x1e30 net/can/isotp.c:668\n deliver net/can/af_can.c:574 [inline]\n can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635\n can_receive+0x31d/0x580 net/can/af_can.c:665\n can_rcv+0x120/0x1c0 net/can/af_can.c:696\n __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5465\n __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5579\n\nTherefore we make sure the state changes and data structures stay\nconsistent at CAN frame reception time by adding a spin_lock in\nisotp_rcv(). This fixes the issue reported by syzkaller but does not\naffect real world operation."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - The bug is in isotp_rcv() on the SocketCAN receive path (can_rcv → can_receive → can_rcv_filter → deliver), reached when CAN frames matching a bound ISOTP rx_id arrive on the bus—an adjacent shared-segment network like automotive/industrial CAN, analogous to Bluetooth.\nAC:L - The attacker controls both sides of the race by injecting concurrent First Frame and Consecutive Frame traffic for the same CAN ID so SMP softirq contexts run isotp_rcv_ff() and isotp_rcv_cf() in parallel, as syzkaller demonstrated; no attacker-uncontrollable condition is required.\nPR:N - Classic CAN/ISO-TP reception has no authentication; once a victim ISOTP socket is bound (normal for UDS/diagnostics), an unauthenticated bus peer can trigger the path with no host credentials or capabilities.\nUI:N - Frames are processed automatically in softirq once an ISOTP socket is bound and the CAN interface is up; no victim mount, open, or other interactive action is required.\nS:U - Corruption is confined to in-kernel ISOTP/socket heap state within the same OS security authority; there is no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Concurrent isotp_rcv_ff() can inflate so->rx.len past the fixed rx.buf[MAX_MSG_LENGTH+1] while isotp_rcv_cf() still writes, yielding a heap out-of-bounds access; under kernel OOB/memory-corruption guidance this supports high confidentiality impact.\nI:H - The same unlocked FF/CF race allows out-of-bounds writes into the embedded tpcon buffer and adjacent isotp_sock fields, a heap corruption primitive suitable for integrity/control-flow impact when scored conservatively.\nA:H - The documented race makes alloc_skb()/skb_put() use an inconsistent so->rx.len and triggers skb_over_panic()/BUG in softirq, which is a full kernel availability failure that an adjacent peer can repeat at will."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/can/isotp.c"
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],
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"net/can/isotp.c"
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],
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"versions": [
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{
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"version": "5.10",
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"status": "affected"
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"version": "0",
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},
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{
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"version": "5.10.101",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.24",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.16.10",
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"lessThanOrEqual": "5.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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}
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"cpeApplicability": [
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"url": "https://git.kernel.org/stable/c/7b53d2204ce79b27a878074a77d64f40ec21dbca"
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}
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],
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"title": "can: isotp: fix potential CAN frame reception race in isotp_rcv()",
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-48830",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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{
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"Technical Impact": "partial"
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"version": "2.0.3",
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"timestamp": "2024-09-10T16:57:30.557476Z"
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"title": "CISA ADP Vulnrichment",
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"dateUpdated": "2024-09-11T17:34:11.140Z"
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} |